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USB to Serial Port Adapter/ Windows XP Service Pack 3

Question

I had been using a Prolific USB to Serial Port adapter to access a serial port device (a Campbell Scientific data storage peripheral). The set-up worked fine while my operating system was Windows XP Service Pack 2. However, since my machine has been upgraded to Service Pack 3, I am not able to connect to the device. I receive the error message that “Standard prompt not received’. To confirm that the trouble is not with any of the hardware components, I used the adapter to connect to the serial port device on a computer with XP Service Pack 2 and all worked well.

All replies

Please try to un-install and re-install the software, find the setupapi.log and read it, find the string "PID_2303" (if it is a Prolific 2303 device), also search for the error "Standard prompt not received"

Iwas able to install the identical driver on second machine who's operating system is XP SP2. I am able to sucessfully connect to the serial port device on the machine with SP2, but not with the machine with SP3.

i am using win XP SP3 .i also had same problem i was do every thing re install driver and change com port .My usb converter driver install successfully but when i connect hardware it was not recognized and a yellow singe on this device in
device manager

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